Reference
36 80E00 ElectricalSampling Modules User Manual
Overview Controlelem ents& resources
Totake a common mode or differential TDR
measurement(cont.)
20. When the TDR steps on the two channels are opposite
(oneposit ive and one negative), you can define a math
waveform that represents the difference signal by
pressingt he VERTICAL MENU button, selecting the
Vert tab, selecting Waveform M1,On, and then
selecting Define,C1,+,C2,Math Waveform On, and
OK.Set the scale to ρ(if using volts, subtract the
waveforms.).
Takea
measurement
21. Takeyour measurement. For more information see Ta ke
automatic measurements on page 25, or Takecursor
measurements on page 26.
TDT
measurements
22. Youcan make forwardand reverse Time Domain
Transmission(TDT) measurements usi ng the 80E04. To
performa TDT m easurement, connect one sampling
module channel to the input of the device under test and
the other sampling module channel to the output of the
device under test.
23. Thenal ternately enable the step generators on one
channel while sampling the transmitted signal on the
otherchannel to perform forward and reverse TDT
measurements. Youmeasure the step transmi tted
throught he device rather than reflections from the
device (asi n TDR).
Note:If t he second channel is not connected to the same
device as the first channel, crosstalk is displayed, as
opposedt o the step transmitted through the device.
Deviceunder test
Takea
measurement
24. Takeyour measurement. For more information see Ta ke
automatic measurements on page 25, or Takecursor
measurements on page 26.